# Help me program the taillights of a car

Hello.
I had Ben make a program before, and I’ve been studying various things based on it, but it’s still difficult, so can you help me?

The program that Ben taught me is:

``````var parkingPin = 5
var brakePin = 4
var turnPin = 16;

var direction = 0
var pixels = array(pixelCount)
var mode = 0
var lastMode = 0
var modeFns = array(4)

pinMode(parkingPin, INPUT);
pinMode(brakePin, INPUT);
pinMode(turnPin, INPUT);

modeFns[0] = (i) => {} //dark
modeFns[1] = (i) => { hsv(0.05, 1, pixels[i]) } // yellow/orange turn
signal swipe
modeFns[2] = (i) => { hsv(0, 1, 1) } //full red
modeFns[3] = (i) => { hsv(0, 1, 0.3) } // dim red

function getMode() {
return 1
return 2
return 3
return 0
}

export function beforeRender(delta) {
direction = 0
}

if (direction != 0) {
pixels[i] = 1
}
mode = getMode()

//check if binker mode is stopping, set a timer to prevent red
if (lastMode == 1 && mode != lastMode) {
}

signal), draw black
if (blinkerTimer > 0 && mode != 1) {
mode = 0
}
lastMode = mode

if (mode == 1)
start()
else
dark()
}

function start() {
if (direction != 0)
return
direction = 1

}

function dark() {
for (i = 0; i < pixelCount; i++) {
pixels[i] = 0
}
direction = 0
}

export function render(index) {
modeFns[mode](index)
}
``````

In this program, the turn signal is only on one side, so I would like to add a mode that flows in the opposite direction.

If there is an input in GP5, I would like to create a program that flows in the opposite direction of the GP16 program and a program that flows in the center or left and right when GP5 and GP16 are turned on at the same time. Is this possible?

I don’t speak English, so I’m converting with translation software. Please forgive strange sentences.

Hi @kuu_neru,

You might also want to check out this thread:

It was the beginning of where that pattern came from, and might help understand how and why some of the code works.

I hope to come back to this thread and write more later, unless other folks beat me to it and answer you, but wanted to at least get you started!

1 Like

I checked past threads, but couldn’t understand.

This program is a program that flows the turn signal from the beginning to the end, but it cannot be changed to a program that